Flexible drive connection for web reeling apparatus



May 7, 1935.

P. BERGGREN FLEXIBLE DRIVE CONNECTION FORWEB REELI'NG APPARATUS Original Filed Dec. 20, 1923 2 Sheets-Sheet 1 JohanBerggrm.

INVENTOR BYM W ATTORN Per y 9 P. J. BERGGREN 2,000,436

FLEXIBLE DRIVE CONNECTION FOR WEB REELI-NG APPARATUS Original Filed Dec. 20. 1923 -2 Shets-Sheet 2 Fig 8 Per J'oka nBemgre IN VEN TOR.

- ATTORNEYS.

Patented, May 1935 PATENT OFFICE FLEXIBLE DRIVE CONNECTION FOR WEB REELING APPARATUS Per Johan Berggren, Chicago, Ill. Original application December 2c, 1928, Serial No. 327,200. Divided and this application May 5, 1933, Serial No. 669,520

Claims.

This invention relates to web reeling appara-.

rangement and relative location of parts which go to make up a simple, cheap and efficient connection for motion picture "reels.

Referring to the accompanying drawings? Figure 1 is a partial view in elevationof a motion picture -machine embodying features of the invention;

Fig. 2 is an end view showing the manner of fastening the pay-ofl and take-up reels on their respective drive shafts;

Fig. 3 is a detail sectional view showing .the manner of flexibly coupling the pay-off reel to its drive shaft;

Fig. 4 is an end view of the Fig. 3;

Fig. 5 is a sectional view taken along the line 55 of Fig. 3;

Fig. 6 is a partial end view of the take-up reel showing the pivoted member for holding the reel on its shaft; i

Fig. '7 is a detail sectional view of the film receiving reel showing the means for taking up wear in journal bearings thereof;

Fig. 8 is an end view of the sprocket and disc coupling means of Fig. '7.

While the invention is described as applied to driving coupling means of a motion picture projecting machine such as de'- scribed in detail in application Serial No. 327,200, filed December 20,1928, it will be understood that the invention is applicable to any known type of 0 motion picture projecting apparatus. Accordingly only thoseparts of the motion picture projector are shownin order to enable a clear understanding to be attained of the invention.

Accordingly in Fig. 1 the numeral 00' represents one of the supporting standards of the motion picture projector to which is attached the horizontal bar GI carrying the base 14 on which .is mounted the lamp housing 13 and associated parts. Attached to the standard 80 is bracket II which supports the upper or pay-off reel I91 and the lower or take-up reel I08, together with the associated projection and film feedingdevices illustrated diagrammatically in Fig. 1 of the drawings.

The take-up reel E05 is carried by a shaft I03,

which is driven through bevel gears 90 from main shaft 9| by means of a sprocket operating over a sprocket wheel I04. Shaft I03 is supported in a long bearing member I 08. The sprocket wheel I04 is held between two fibre washers I83, I84 and 5 is otherwise loose to rotate on the reel shaft. The sprocket wheel I04 is provided with an extended bearing hub I04". The washers I83, I84 are clamped against opposite faces of the sprocket wheel by means of discs I85, I86 and are freely and rotatably mounted. The outer disc I85 is mounted on the reel shaft I03, and is secured thereto by pin I85 to rotate therewith. The inner disc I88 is splined to rotate with the reel shaft but free to slide therealong and is provided with an extended bearing hub I86. A spring I81 is coiled upon the reel shaft and is held in compression between the disc I88 and an adjustable nutl88, whereby its compression may be adjusted. The nut I88 is supported on along sleeve I88 secured to shaft I03 by means of a set screw I88 .and telescoped with the bearing member I03 By reason of this structure, both the nut and the disc rotating with the reel shaft, the compression spring likewise rotates with said shaft, so that there is no relative rotation of the spring and nut or disc, which would cause wear or a rut or groove and a consequent change of tension of the spring. Consequently I am enabled to secure a constant even pressure of both discs at all times, on the respective faces of the driving sprocket without regard to any increase in weight due to the film being wound on the reel. This is particularly advantageous with a wide and heavy film because otherwise the increasing weight of the film load on the reel would increase the tendency to cant the shaft and thereby cause an increasing centrifugal action which would tend topull the shaft away from the line of sprocket drive, thereby increasing the tension of' the spring and finally causing it to grip the thereby locking the sprocket wheel to the reel "shaft and resulting in breakage of the film. I I

The magazine or pay-oil'- reel employs substantially the same structure but it operates in a reverse manner to that above described in that instead of a driven sprocket wheel, a stationary disc I89 is interposed between the two friction discs I90, ISI, the clamp discs I92, I93, nut I84 and spring i85 being the same in function and operation as above described. The disc I92 has an extended hub I92. The disc I93 is secured to shaft I98 by means of pin I93. The nut I94 is supported on the long sleeve I94. The disc I98 is held stationary by means of apin or stud Ill andhas an extended hub I89. Thus an even beyond said bearing member, a sprocket wheel frictional resistance is maintained at all times having an extended hub rotatably mounted on on the unreeling rotations of the reel. The reels the extending end of said shaft, a clamping disc Ill, I81 are detachably locked on the barrels secured on the extendin end of said shaft ad- 5 ill of their shaft I88, by 'means of a lug I99, jacent the sprocket wheel, a second clamping 5 eccentricaliy mountedon the end surface of each disc having an extended hub splined to the exshaft so that when turned into one position the tending end 'of said shaft, a pair of friction discs lug will extend-beyondthe periphery of the interposed between-the sprocket wheel and the shafts, thereby forming a retainer to retain the clamping discs, said friction discs being freely 10' reel on the shaft, and when turned into another and rotatably mounted, the extended hub of the position it will be out of reel retaining position. sprocket projecting through one of said friction The shaft I" is supported in a long bearing discs, along sleeve secured to the extending end Ill similarfto bearing I03. A spring pressed of said shaft and overlying the bearing member, stud 2" serves to detachably retain the retaina long compression spring surrounding said l5 ing lug in looking or in releasing position. sleeve and engaging one of the clamping discs, 1

This application is a division of application and means on said sleeve for adjusting the ten-' Serial No. 327,200, flied December 20, 1928. sion on said spring. 1 What is claimed is: 4. In a motion picture apparatus, a film reel, 1. In a motion picture apparatus, a film reel, a rotatable shaft for supporting said reel, a long a shaft uponwhich the reel is mounted, a long bearing member in which said shaft is journaled, bearingmember in which the shaft is journaled, a disc freely mounted on said shaft and fixed a sleeve secured to said shaft and telescoped-with against rotation, a clamping disc secured to said said bearing member, a sprocket wheel journhled shaft on one side 'of said fixed disc, a second onsaid shaft, friction discs engaging both sides clamping disc splined .to said shaft and mounted of said sprocket, a clamping disc secured to said on the opposite side of said fixed disc, said secshaft and engaging one of said friction discs, a on'd clamping disc second clamping,dis having an extended hub on said shaft and engaging the other friction disc, an adjustable nut on said sleeve, and a compression spring lying between said nut and said second clamping disc. I

2. In a motion picture apparatus, a film reel, a shaft upon which the reel is mounted, a long bearing member in which the shaft is joumaled, 5 a sleeve secured to said shaft and telescoped with said bearing member, a sprocket wheel journaled on said shaft, friction discs eng both sides of said sprocket, a clamping disc secured to said shaft and engaging one of said-friction discs, a second clamping disc having anextended hub on saidshaft and engaging the other friction disc, anldiustahle' nut on said sleeve, and a long compression spring lying betweensaid nut and said second clamping disc, all of said parts with the exception of the long bearing member being rotatable as a unit' with said shaftr 3. In a motion picture apparatus, a'film reel, a shaft for supporting said reel, :1 'long fixed bearingmemberinwhichsa'id shaftis i ed,

so said'shaftattheendoppositethereel tion, a pair of friction discs interposed between the fixed disc and the clamping. discs, a long sleeve secured to said shaft and overlying said bearing member, an adjustable nut on said sleeve,

having an extended hub por-- and a long compression spring interposed between the nut and said second clamping disc.

5. In a motion picture apparatus, a film reel,

a rotatable shaft'for supporting said reel, along bearing member in which said shaft is journaled,

a disc freely mountedon said shaft and fixed. against rotation, a clamping disc secured to said" shaft on ,one side of said fixed disc, a second clamping disc splined to said shaft and mounted on the opposite side of said fixed disc, said second clamping disc having an extended hub portion,

a pair of friction discs interposed between the 1 fixed disc and the clamping discs, a long sleeve secured to said shaft and overlying said bearing -meinber, an adjustable nut on said sleege, and a long compression spring interposed between the nut and said second clamping 'disc, said fixed disc having an extended hub portion in contact with said shaft;

PER JOEAHBERGGREN. 

